#pragma once

extern "C"{
#include	<stdio.h>
#include	<string.h>
#define EPR                 fprintf(stderr,
#define ERR(str, chr)       if(opterr){EPR "%s%c\n", str, chr);}
int     opterr = 1;
int     optind = 1;
int	optopt;
char    *optarg;

int
getopt(int argc, char *const argv[], const char *opts)
{
	static int sp = 1;
	int c;
	const char *cp;

	if (sp == 1)
		if (optind >= argc ||
			argv[optind][0] != '-' || argv[optind][1] == '\0')
			return -1;
		else if (strcmp(argv[optind], "--") == 0) {
			optind++;
			return -1;
		}
		optopt = c = argv[optind][sp];
		if (c == ':' || (cp = strchr(opts, c)) == 0) {
			ERR(": illegal option -- ", c);
			if (argv[optind][++sp] == '\0') {
				optind++;
				sp = 1;
			}
			return '?';
		}
		if (*++cp == ':') {
			if (argv[optind][sp + 1] != '\0')
				optarg = &argv[optind++][sp + 1];
			else if (++optind >= argc) {
				ERR(": option requires an argument -- ", c);
				sp = 1;
				return '?';
			}
			else
				optarg = argv[optind++];
			sp = 1;
		}
		else {
			if (argv[optind][++sp] == '\0') {
				sp = 1;
				optind++;
			}
			optarg = 0;
		}
		return c;
}
}